OpenImageIO/oiio — pull request #385 by StefanStavrev (2012-06-23 20:22:29+00:00)
Title: Image Processing Operation: Invert

The code is similar to previous operations.

Please ignore the common code like the ROI class and parallel_image.

I had to copy common code like this, to keep it simple for now, both
in terms of branches organization and compile time.

So you can ignore imagebuf.h and imagebuf.cpp, nothing new there.